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The five-piece Chicago garage band, whose members are still too young to legally drink, made their television debut on Letterman’s Late Show back in January, performing their song “Who Needs You” off their 2013 EP of the same name.

Wearing mismatched sneakers and a Derrick Rose Bulls jersey, frontman Mario Cuomo writhed around the floor and popped a squat in Letterman’s guest chair. When it was all said and done, Letterman wanted more. But what the host got instead was five very confused Chicagoans watching Paul Shaffer do his best impression of Cuomo. Floor writhing and all.

Six months later, the band returned to perform “The Righteous One” off their recently released debut, Disgraceland. This time around they were ready to play that requested encore. “I thought they would want one. So yeah, we were prepared,” Cuomo told Radio.com over the phone at a stop in Nashville.

When Radio.com caught up with Cuomo, he was nursing a pretty bad cough, which he blamed on the fact that he had played 13 shows in 12 days. His band is in high demand thanks to word-of-mouth praise over their raucous live shows, which tend to feature stacks of guitars, stage diving and a whole lot of hair. “My hair is half of my performance,” Cuomo said in reference to his long blonde locks.

According to the frontman, The Orwells are the male version of teen dreams, The Runaways, noting that if you put wigs on him and his bandmates, no one would even know the difference. “I’m like the f—ing blonde, Cherie Currie,” he said of the all-girl rock band’s frontwoman. “I’m trying to like shake my a– for the people.”